Asriel on 25 June 2014
As Rol pointed out, most of that exclusive third party support came from Japan. More importantly, a huge amount of support came from middle-tier Japanese development, which has since moved onto PSP, DS, 3DS, and now mobiles, because they've been priced out of home console development.
So long as Xbox One owners continue to buy Western multi-platform titles, Western publishers will continue to develop multi-platform titles. Again, far higher development costs and manpower requirements are at play here: third parties need a couple of successful consoles on the market to reap dividends on their investments.
